Mathematics - 15 June 2007

what is the volume of helium required to fill a spherical balloon so that its surface area is 1200cm2(squared)

2007-06-15 06:08:29 · 7 answers · asked by Tina B 1

A trapezoid has bases of length x meters and (x+6) meters. Its height is 4 meters. Find the lengths of the bases if the area is 64 square meters. The formula for the area of a trapezoid is : 1/2 (base + base)h

2007-06-15 06:08:06 · 6 answers · asked by Anonymous

2007-06-15 06:04:48 · 4 answers · asked by Anonymous

x: 8(2x - 3)+5=61

2007-06-15 06:02:43 · 8 answers · asked by Anonymous

n: 2/3n + 4 = 10 - 4/3n

2007-06-15 05:59:15 · 6 answers · asked by Anonymous

I feel that my level of mathematics has become like a pool of stagnant water, what should I do next to improve other than listening to my teachers in class?

I thought of reading further. But...My teacher said that I would suffer from conceptual misunderstandings if I read books beyond my level and die eventually.

2007-06-15 05:52:54 · 10 answers · asked by Anonymous

possible anwsers are the following:
a. (-2,3), (2,1)
b. (-2,3), (4,0)
c. (0,2), (4,0)
d. (0,2), (2,1)

2007-06-15 05:51:24 · 4 answers · asked by Anonymous

For the function, use a T-chart to find plot points, then select a letter that matches the points on your graph.
g(x) = -3 X 9^{(x + 1)/2} + 1

A Points (5,8) (4,7) (3,6)
B Points (10,2) (5,4) (2,6)
C Points (0,0) (1,1) (2,2)
D Points (3,2) (4,5) (1,3)
E Points (-2,-1) (-4,-5) (-10,-14)
F Points (-3,2/3) (-1,-2) (1,-26)

2007-06-15 05:43:56 · 2 answers · asked by Anonymous

hello everyone.. i think i got this right please let me know..

the sum of 3 consecutive odd intergers is 27

ok so since each odd interger is 1 larger than the previous interger i came up with

x + (x+2) + (x=4)=27 is this right?

2007-06-15 05:17:32 · 5 answers · asked by Cat 1

Explain why??
((guyzzz dis is in calculus)

2007-06-15 05:16:30 · 2 answers · asked by Anonymous

I am having a hard time with questions like these. When it is just the circle alone I am good to go, but in this case the cone is overlapping part of the circle... Please help me by showing all your work. Thanks so much.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A mural of a scoop of ice cream inside an ice cream cone is to be painted on the side of a concession stand. The radius of the icecream is 25.0cm and the radius of the top of the cone is 20.0cm

a) calculate the total area for the ice cream scoop circle

b) calculate the central angle determined by the arc of the ice cream inside the cone

c) calculate the area of the sector ACB (A is on end point of the top of the cone, C is the center of the ice cream scoop and B is the other end point of the top of the cone)

d) Calculate the area of the triangle that ACB forms

e) calculate the area of ice cream to be painted.

2007-06-15 05:14:21 · 1 answers · asked by Anonymous

How do I go about converting an exponential function like y=100(2.24)^x to logarithmic form? What is the general rule?Thank you so much!

2007-06-15 05:10:03 · 3 answers · asked by Anonymous

2007-06-15 05:05:30 · 3 answers · asked by Anonymous

sin (π/2) - sin (5π/12)

it's in radians

these are the answer choices, but i don't think any of them work :

a) -√2/2
b) √2/2
c) 0
d) 1

2007-06-15 05:03:31 · 3 answers · asked by Andrew F 2

can someone help? translate this expression:

two numbers that differ by 9

2007-06-15 04:54:38 · 10 answers · asked by Cat 1

Solve by using a proportion

1. The ratio of taxis to private automobiles in Times Square at 6:00 P.M. on New Year’s Eve was estimated to be 15 to 2. If there were 60 taxis, then how many private automobiles were there?


2.Water and rice. At Wong’s Chinese Restaurant the secret recipe for white rice calls for a 2 to 1 ratio of water to rice. In one batch the chef used 28 more cups of water than rice. How many cups of each did he use?


3. ) Tracy, Stacy, and Fred assembled a very large puzzle together in 40 hours. If Stacy worked twice as fast as Fred and Tracy worked just as fast as Stacy, then how long would it have taken Fred to assemble the puzzle alone?

4. When bert and Eerie merged their automobile dealerships. Bert had 10 more cars than Ernie. While 36% of Ernies stock consist of new cars, only 25% of Bert's stock consist of new cars. If they had 33 new cars on the lot after the merger, then how many cars did each one have before the merger?

Thank you

2007-06-15 04:51:37 · 1 answers · asked by CHRISTOPHER R 1

tanh(x/y) = arctanh(y/x)

2007-06-15 04:49:08 · 2 answers · asked by Anonymous

the question is 2(x-3w)= -3(x=w) here is how i worked it:

2x-6w= -3x-3w
2x+3x= 6w-3w
5x=3w
5x x 1/5= 3/5w
x=3/5w

is this right??

2007-06-15 04:16:18 · 10 answers · asked by Cat 1

Determin the path of the steepest descent along the surface z=A+x+2*y-x^2-3*(y^2) from the point (0,0,A).

2007-06-15 04:13:53 · 2 answers · asked by anechka 2

The intensity of light is given by I(x,y)=A-2*x^2-y^2. Find the path followed by a light-seeking particle that originates at poin (-2,1).

2007-06-15 04:11:56 · 1 answers · asked by anechka 2

2007-06-15 04:10:22 · 3 answers · asked by !!!!!DR.???? 1

A. middle, dimeter
B. outer edge, diagonal
C. center, radius
D. hyperbola, chord

2007-06-15 04:07:41 · 7 answers · asked by Lizza C 1

2007-06-15 03:41:36 · 8 answers · asked by Anonymous

If y = 4e^2x+1, then write dy/dx in terms of y.

2007-06-15 03:37:36 · 4 answers · asked by Whitney H 1

Hi,
I'm in intermediate Algebra in college. We are now on chapter 4 which is systems of equations. For the life of me I cannot seem to understand the elimination and substitution process. I'm getting so discouraged with myself over this and am starting to lose the confidence that took me so long to build. Could some please explain these two problems to me in step detail? I really need help. Thanks so much.

1.) x+y=10
y= 4x

2.) 4x-y=9
2x + 3y= -24

2007-06-15 03:34:56 · 7 answers · asked by N 3

f(x)=x(x+2)^3(2x+3)^2

2007-06-15 03:28:37 · 2 answers · asked by taz073188 1

to determine if g(x)=4x^3-3x+3 has a zero between -2 and -1?

2007-06-15 03:14:09 · 2 answers · asked by taz073188 1

2007-06-15 03:07:34 · 5 answers · asked by andra s 1

ok i dont know why this is so difficult for me.. the question is 1/3q-6=1/5q

1/3q-6=1/5q.
15/1x1/3q-6=1/5qx15/1
5q-6=3q
5q-3q=6
2q=6
q=3
they say the answer is 60?????? what am i doing wrong???

2007-06-15 03:04:46 · 10 answers · asked by Cat 1

f(w)=w^2
find [f(w)-f(3)]/w-3
the answer is w+3, but i dont know how to get it.

2007-06-15 03:02:50 · 8 answers · asked by dancer22 1